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United States Patent | 5,067,659 |
Heeren ,   et al. | November 26, 1991 |
Refuse scrap from incinerated refuse or nonincinerated refuse is dried and precleaned to a metal content in excess of 70% and is then comminuted and abraded in a hammer shredder with the comminuted material being subjected to air separation and magnetic separation to yield a metal product containing at least 90% metal and with a density of at least 1 ton per m.sup.3 for direct use as any other iron scrap in a steel-making plant.
Inventors: | Heeren; Evert (Weener, DE); Gotthelf; Hans (Schwerte, DE) |
Assignee: | Hoesch Werke AG (Dortmund, DE) |
Appl. No.: | 566842 |
Filed: | August 13, 1990 |
Oct 22, 1982[DE] | 3239135 |
Current U.S. Class: | 241/19; 241/23; 241/24.14; 241/27; 241/29; 241/DIG.38 |
Intern'l Class: | B02C 023/08 |
Field of Search: | 241/14,19,24,27,29,23,DIG. 38 |
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971405 | Sep., 1910 | Reed | 241/23. |
2942792 | Jun., 1960 | Anderson et al. | 241/14. |
3081954 | Mar., 1963 | Heckett | 241/14. |
3524594 | Aug., 1970 | Anderson et al. | 241/24. |
3605243 | Sep., 1971 | Oster | 241/29. |
3817458 | Jun., 1974 | Gilberto | 241/24. |
3848813 | Nov., 1974 | Stanczyk et al. | 241/19. |
3905556 | Sep., 1975 | Drage | 241/24. |
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